Frame dialog data exchange
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class DataExchangeTest extends JFrame implements ActionListener {
private ConnectDialog dialog = null;
private JMenuItem connectItem = new JMenuItem("Connect");
public DataExchangeTest() {
setTitle("Data Exchange");
setSize(300, 300);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
JMenuBar mbar = new JMenuBar();
setJMenuBar(mbar);
JMenu fileMenu = new JMenu("File");
mbar.add(fileMenu);
connectItem.addActionListener(this);
fileMenu.add(connectItem);
}
public void actionPerformed(ActionEvent evt) {
Object source = evt.getSource();
if (source == connectItem) {
UserInfo transfer = new UserInfo("yourname", "pw");
dialog = new ConnectDialog(this);
if (dialog.showDialog(transfer)) {
String name = transfer.username;
String pwd = transfer.password;
Container contentPane = getContentPane();
contentPane.removeAll();
contentPane.add(new JLabel("username=" + name + ", password=" + pwd), "Center");
validate();
}
}
}
public static void main(String[] args) {
JFrame f = new DataExchangeTest();
f.show();
}
}
class UserInfo {
public String username;
public String password;
public UserInfo(String u, String p) {
username = u;
password = p;
}
}
class ConnectDialog extends JDialog implements ActionListener {
private JTextField username = new JTextField("");
private JPasswordField password= new JPasswordField("");
private boolean okPressed;
private JButton okButton;
private JButton cancelButton;
public ConnectDialog(JFrame parent) {
super(parent, "Connect", true);
Container contentPane = getContentPane();
JPanel p1 = new JPanel(new GridLayout(2, 2,3,3));
p1.add(new JLabel("User name:"));
p1.add(username);
p1.add(new JLabel("Password:"));
p1.add(password );
contentPane.add("Center", p1);
Panel p2 = new Panel();
okButton = addButton(p2, "Ok");
cancelButton = addButton(p2, "Cancel");
contentPane.add("South", p2);
setSize(240, 120);
}
private JButton addButton(Container c, String name) {
JButton button = new JButton(name);
button.addActionListener(this);
c.add(button);
return button;
}
public void actionPerformed(ActionEvent evt) {
Object source = evt.getSource();
if (source == okButton) {
okPressed = true;
setVisible(false);
} else if (source == cancelButton)
setVisible(false);
}
public boolean showDialog(UserInfo transfer) {
username.setText(transfer.username);
password.setText(transfer.password);
okPressed = false;
show();
if (okPressed) {
transfer.username = username.getText();
transfer.password = new String(password.getPassword());
}
return okPressed;
}
}
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